The return that a promisor receivers for his or her promise, where all contracting parties receive each other’s promises as consideration for their own. Related entries Central Adjustment Bureau, Inc. v. Ingram Feinberg v. Pfeiffer Co. Whitten v. Greeley-Shaw Earle v. Angell Congregation Kadimah Toras-Moshe v. DeLeo Mills v. Wyman Eastern Air Lines, Inc. v. Gulf Oil Corporation Mattei v. Hopper Langer v. Superior Steel Corp. Pre-Existing Duty Rule